Jose Mourinho has said he is worried there is a campaign against Premier League leaders Chelsea to try and influence referees’ decisions.

The Portuguese coach was angry midfielder Cesc Fabregas was booked for diving after going down in the area under 19-year-old full-back Matt Targett’s challenge in a 1-1 draw against Southampton on Sunday.

He felt referee Anthony Taylor missed a clear penalty decision and blamed external influences on his players not being given decisions.

In his news conference, he told reporters: “There is a campaign against Chelsea. I don’t know why there is this campaign and I do not care.

“Everybody knows it was a penalty. The referee made a mistake, people make mistakes and he made a big mistake. He is a good referee and a good guy, he is young, he has years and years of football ahead of him but it is a big mistake.”

West Ham manager Sam Allardyce accused Branislav Ivanovic of trying to win Chelsea a penalty on Friday in a 2-0 win at Stamford Bridge and Mourinho suggested referees are being swayed by comments in the media.

He added: “After the game against West Ham, Sam is speaking about Branislav Ivanovic [diving], what is this? Then, you come here [Southampton] and you have a crucial decision and the referee makes the wrong decision. He made a mistake. He assumed it.

“Out of nothing, Allardyce starts speaking about Chelsea players diving, then another coach and another coach. The referee changes a penalty for a yellow card.”

Chelsea are currently priced 1.40 to win the Premier League and 8.00 to win this season’s Champions League.

Looking for more from bet365? Follow us on Twitter, like us on Facebook or +1 us on Google+ for fun competitions, special offers & much more!

Don’t forget, all Premier League matches are covered by the bet365 100% Euro Soccer Bonus, where you could earn a bonus of up to 100% on your returns on pre-match accumulator bets.